The use of a radiactive beam of fission products for TDPAC experiments

Abstract

In order to use a wide variety of radioactive nuclei as probes in material research, an on-line isotope separator (ISOL) for fission products has been utilized to produce and accelerate short-lived nuclei suitable for TDPAC experiments. The¹⁴⁰Cs isotope (T _1/2=63.7 s) from ISOL has been implanted into YBaCuO compounds to investigate the hyperfine field around a Ba atom. The¹⁴⁰Ba-¹⁴⁰La source of 3×10⁴ decays/s is obtained for TDPAC experiments on the 329–487 keV γ-γ cascade in¹⁴⁰Ce. Another candidate was examined to use the 345–94 keV cascade in the⁹¹Rb (T _1/2=58 s) decay. The angular correlation coefficients, however, unfortunately turned out to be fairly small. A tentative result of theg-factor measurement has been given. The details of the present method have been described with emphasis on the application to material research.